JPS6392473U - - Google Patents
Info
- Publication number
- JPS6392473U JPS6392473U JP18822886U JP18822886U JPS6392473U JP S6392473 U JPS6392473 U JP S6392473U JP 18822886 U JP18822886 U JP 18822886U JP 18822886 U JP18822886 U JP 18822886U JP S6392473 U JPS6392473 U JP S6392473U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- brightness
- iris
- gate circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000284 extract Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 1
Landscapes
- Exposure Control For Cameras (AREA)
- Color Television Image Signal Generators (AREA)
Description
第１図及び第２図は本考案の一実施例を示すも
のであつて、第１図はビデオカメラのアイリス調
整装置のブロツク図、第２図はパルス発生回路の
出力パルスを説明するためのタイミングチヤート
である。
２はアイリス、３は撮像装置、６はアイリス制
御回路、８はゲートＡ回路（下部輝度ゲート回路
）、９はゲートＢ回路（上部輝度ゲート回路）、
１０は輝度レベル比較回路、１１はゲートＥ回路
（制御ゲート回路）、１２はパルス発生回路、１
３はゲートＣ回路（上部色ゲート回路）、１４は
ゲートＤ回路（上部色ゲート回路）、１５は色成
分判別回路である。
1 and 2 show an embodiment of the present invention, in which FIG. 1 is a block diagram of an iris adjustment device for a video camera, and FIG. 2 is a block diagram for explaining the output pulses of a pulse generation circuit. This is a timing chart. 2 is an iris, 3 is an imaging device, 6 is an iris control circuit, 8 is a gate A circuit (lower brightness gate circuit), 9 is a gate B circuit (upper brightness gate circuit),
10 is a brightness level comparison circuit, 11 is a gate E circuit (control gate circuit), 12 is a pulse generation circuit, 1
3 is a gate C circuit (upper color gate circuit), 14 is a gate D circuit (upper color gate circuit), and 15 is a color component discrimination circuit.
Claims (1)
いて自動的にアイリス調整を行うことができるビ
デオカメラのアイリス調整装置において、 映像信号のうち輝度信号から画面上部の信号成
分のみを取り出す上部輝度ゲート回路と、この輝
度信号から画面下部の信号成分のみを取り出す下
部輝度ゲート回路と、この上部輝度ゲート回路及
び下部輝度ゲート回路が取り出した各信号の輝度
レベルを比較する輝度レベル比較回路と、映像信
号のうち色信号から画面上部の信号成分のみを取
り出す上部色ゲート回路と、この上部色ゲート回
路が取り出した信号の色成分を判別する色成分判
別回路と、色成分判別回路の判別結果に応じて、
輝度レベル比較回路の比較結果出力のゲート制御
を行う制御ゲート回路と、制御ゲート回路のゲー
トが開くと、輝度レベル比較回路の比較結果に応
じて、アイリス制御信号に基づくアイリス調整値
を開方向に補正するアイリス制御回路とを備えた
ことを特徴とするビデオカメラのアイリス調整装
置。[Claim for Utility Model Registration] In an iris adjustment device for a video camera that can automatically adjust the iris based on an iris control signal detected from a video signal, only the signal component from the luminance signal to the upper part of the screen of the video signal A lower brightness gate circuit extracts only the signal component at the bottom of the screen from this brightness signal, and a brightness level comparison that compares the brightness levels of each signal extracted by the upper brightness gate circuit and the lower brightness gate circuit. an upper color gate circuit that extracts only the signal component at the top of the screen from the color signal of the video signal, a color component discrimination circuit that discriminates the color component of the signal extracted by the upper color gate circuit, and a color component discrimination circuit. Depending on the determination result,
A control gate circuit performs gate control of the comparison result output of the brightness level comparison circuit, and when the gate of the control gate circuit opens, the iris adjustment value based on the iris control signal is changed in the opening direction according to the comparison result of the brightness level comparison circuit. An iris adjustment device for a video camera, comprising an iris control circuit for correction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18822886U JPS6392473U (en) | 1986-12-05 | 1986-12-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18822886U JPS6392473U (en) | 1986-12-05 | 1986-12-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6392473U true JPS6392473U (en) | 1988-06-15 |
Family
ID=31139395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18822886U Pending JPS6392473U (en) | 1986-12-05 | 1986-12-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6392473U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02276380A (en) * | 1989-04-18 | 1990-11-13 | Sharp Corp | Image pickup device |
| JPH03179879A (en) * | 1989-07-18 | 1991-08-05 | Fuji Photo Film Co Ltd | Method and apparatus for exposure control of video camera |
-
1986
- 1986-12-05 JP JP18822886U patent/JPS6392473U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02276380A (en) * | 1989-04-18 | 1990-11-13 | Sharp Corp | Image pickup device |
| JPH03179879A (en) * | 1989-07-18 | 1991-08-05 | Fuji Photo Film Co Ltd | Method and apparatus for exposure control of video camera |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH09284784A (en) | Color image pickup device | |
| JPS6392473U (en) | ||
| JP2566425B2 (en) | Imaging device | |
| JPH05122600A (en) | Exposure controller for video camera | |
| JPS6016072A (en) | Image pickup device | |
| JP2769649B2 (en) | Exposure control device | |
| JP3123884B2 (en) | Solid-state imaging device | |
| JPH05167917A (en) | Automatic diaphragm adjusting device | |
| JPH0225178A (en) | Automatic iris circuit | |
| JPS6413032U (en) | ||
| JPH06197268A (en) | Video camera with rear light compensation function | |
| JPS5823462U (en) | tv jiyoung camera | |
| JPH09284640A (en) | Image pickup device | |
| JPS6425278U (en) | ||
| JPH0522653A (en) | Exposure control method for image pickup device | |
| JP2581095Y2 (en) | TV camera backlight compensation device | |
| JPS5791090A (en) | Automatic color balance adjusting device for color television camera | |
| JPH02138731U (en) | ||
| JPS61140685U (en) | ||
| JPS62186566U (en) | ||
| JPS6198087A (en) | Automatic white balance controller | |
| JPH0545119B2 (en) | ||
| JPH0334782A (en) | Camera having special effect generating function | |
| JPS5483721A (en) | Automatic regulator for tri-color luminance of color television | |
| JPH0748816B2 (en) | Video camera automatic focus adjustment device |